Adjustable furniture support



FIG. 1 is a perspective view of an adjustable furniture support, showingmy new design; and,

FIG. 2 is a perspective view in an alternate position.

The surfaces or portions of the article not shown in the drawings ordescribed in the specification form no part of the claimed design.

The broken lines in the figures are illustrative of environment and arenot part of the claimed design.

The ornamental design for an adjustable furniture support, as shown anddescribed.